Machine for making bolts, pins, &amp;c.



PATENTED MAR. 5, 1907.

J. F. LOBER. MACHINE FOR MAKING BOLTS, PINS, 6w,

APPLICATION FILED DEG, 7.1905.

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PATENTED MAR. 5, 1907 No. 846,117. 'JJP. LOBBR.

MAGHINE FOR MAKING BOLTS, PINS, m,

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APPLICATION TILED DEO.7.19"05.

JOHN FRED LOBER, OF PITTSBURG, PENNSYLVANIA.

MACHINE FOR MAKING BOLTS, PINS, 81.0.

Specification of Letters Patent.

Patented March 5, 1907.

Application filed December 7, 1905. Serial No. 290.680.

To all whom it may concern.-

Be it known that 1, JOHN FRED LOBER, a

' citizen of the United States, residing at Pittsuseful Improvements in Machines for Making Bolts, Pins, &c.; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures ofreference marked there on, which form a part of this specification.

This invention relates to improvements in a machine for making or forming the heads of bolts, rivets, coupling-pins, and similar articles at a single operation by forging or compressing the stock in opposing dies, one of which latter is longitudinally movable and separable, so as to release the completed article and permit of its being ejected from the machine, the parts of said die closing at the proper time to receive the stock and present practically a solid die in forming said articles, the other or gripping dies being also separable to receive and release the piece operated upon.

The invention further consists in a means for automatically stopping the machine at each revolution, a means for starting the same, a means for automatically separating the two sets of dies, together with the peculiar construction of said dies, and the invention also consists in the certain details of construction and combination of parts as will be fully described hereinafter.

In the accompanying drawings, Figure 1 is a plan view of a machine constructed in accordance with my invention. Fig. 2 is a side elevation of the same, a part of which is broken away. Fig. 3 is a cross-section taken on the line :0 x of Fig. 1. Fig. 4 is a sectional perspective view on the line y 1 Fig. 1, of the movable head for operating the clutch mechanism, said head being detached from the machine. Fig. 5 is a perspective view showing one portion of the clutch and peripheral cam for releasing the operating-lever. Fig. 6 is a perspective view of a portion of the main gear-wheel, showing the other portion of said clutch. Fig. 7 is a perspective view of the gripping-dies used for holding the stock, said dies shown separate the one from the other. Fig. 8 is a similar view of one set of the forming-dies, the one detached from the other. Fig. 9 is a perspective view of the same dies, showing their relative position when in place in the reciprocating cross-head of the machine. Fig. 10 is a face view and side elevation of a hexagon head of a bolt, illustrating one of the products of the machine. Fig. 1 1 is a side view of a T-head bolt, also one of the products of the machine. Fig. 12 is a similar view of a round-head bolt.

To put my invention into practice, and thereby provide a machine capable of forming various sizes and shapes of the heads of bolts, rivets, coupling-pins, &c., I form from suitable material a bed-plate 1 and mount the same upon legs 2 in such manner that the said bed-plate will be some distance above the floor. Arranged in a vertical position at the forward end of the bed-plate 1 and held in position by dovetailed ends is a plate 3, of hardened steel, which may be adjusted forwardly to take up the wear by set-screws 3, arranged and operated through the end of the bed-plate, the said plate being used as a rest for the gripping-dies. These gipping-dies comprises two blocks of steel the one analogous with the other, (see Fig. 7,) each of which is formed with semicircular grooves 5 and at either side in such manner that when the dies are brought together a complete annular bore is formed, the diameter of which is slightly less than the stock 9 operated upon.

One of these dies 4 is mounted stationary against the face-plate 3 by means of a bolt 7 and clamp 8, and is immovable. The other die 4 is attached by similar means to a sliding block 5 and is capable of being moved transversely or toward or away from the stationary die 4 by means of a connected pin 8, operated by and connected to a lever 46, as will be hereinafter described.

Arranged at the rear of the machine is a drive-shaft 17, suitably mounted in bearings 16, and operated by a pulley 18 or other suitable means. This drive-shaft 17 is fitted at one end with a pinion 19, which is in mesh with a gear-wheel 42, mounted on a countershaft 20, supported in bearings 21 on the top of the bed-plate 1. This shaft 20 is formed with an integral crank 22, to which is connected a pitman 23, the other or forward end of which is j ournaled by means of a bolt to a reciprocating cross-head 24. This crosshead 24 is mounted in slides 26 at either inner side of the bed-plate, .1. and is furnished with adj usting-screws and gib to take up the wear and at the same time permit a free back-and-forward movement of said 1 connected by an integral hub, the outer cross-head in the direction of the length of the machine. This cross-head 24 is provided at its forward end witha means29 for holding one set of the forming-dies 32 34, the other set (which are analogous) being carried by a supplei'nental lateral-moving die-holder 28, which is moved toward the first-mentioned set of dies by an inclined piece 30 during the forward movement of the cross-head and is moved in an opposite direction byatransverse pin or shaft 29, contacting with an oppositely-disposed inclined surface 27, which latter movement serves to open one set of the forming-dies by moving it from the other. These forming-dies are shown in detail at Figs. 8 and 9 of the drawings and consist of four pieces adapted to be arranged in pairs, the one pair similar to the other, and when the individual pieces are respectively arranged in. opposite-disposed pairs a perfect-formed head is produced on the stock 9 by the recesses and the shank kept in its normal position by the longitudinal recesses 35. These above-described dies are made in various sizes to correspond with the stock operated upon and theheading portions 32 recessed to correspond with the head of the article when finished, which may be of varying designs and shapes too numerous to mention, several of which are illustrated on the drawings.

At the forward end of the bed-plate 1 and removably attached thereto by bolts 15 is a tailpiece 14, carrying a threaded bar 1.0 the outer end being square for the application of a wrench. or other tool, and the said bar fitted with locking-nuts 12. This bar 10 may be adjusted in the direction of its length and is used to gage to position the stock 9 while being placed in position prior to the gripping-dies 4 4 taking hold of said stock. This tailpiece may be removed and replaced by others of greater or less length to correspond with extra lengths of stock-pieces 9, thereby allording a means for operating upon bolts or bars of varying lengths.

Located above the bed-plate 1 is a transverse shaft 37, supported in removable bearings 38, which are held in position by bolts projecting through said bed-plate. To the shaft 37 is secured a forwardly-projecting arm 44, having at its forward end a depending finger 45, adjustable a short distance along the length of said arm, which latter serves to eject the completed article, and to insure its proper engagement with. said article said pin is enlarged laterally atits lower end. This ejector is operated from the counter-shaft 20 by a rearwardly-projecting arm 40, which latter is raised and lowered by a cam-lever 41, mounted on said counter-shaft.

Slidably mounted on the counter-shaft 20 and rotated therewith is a head comprising ary.

flange 58 of which is formed with projecting radially-disposed parts 59, which, together with segmental projections 60, formed on the inner face of the gear-wheel 42, forms and completes a clutch, by means of which the counter-shaft 20 may be rotated by the drive-shaft 17 or allowed to remain station- This moving head and its clutch is operated to disengage said clutch by means of a stationary or fixed pin 55, attached on g a support 56, being brought in contact with a cam 54, formed on the inner face of the flange 53, during the rotatable movement of said head. engagement by hand from the front of the machine by the operator by means of a long lever 46, pivoted to a bracket 47 and fitted at its forward end with a suitable handle 51. This lever 46 is locked when the chrtch 59 60 is engaged by a dog 67, pivoted at 68 to the lever 46, engaging in the notch of a horizontal-disposed rack-bar 49, and is automatically released by a cam 61, formed on the periphery of the flange 58, the said cam. operating in connection with a roller 63 journaled to a bar or red 62, arranged in guides 62, attached to the outer edge of said lever 46 in such manner that when the rod 62 is moved forward in the direction of its length by the action of the cam 61 the dog 67 will be lifted. free from the notch 50 and permit the pin and cam 54 to (lisengage the clutch to stop the motion of the machine. This rod 62 is recovered or brought back to its normal position by the action of a spring 64, compressed between a nut 65 and one of the guidepieces 62. The rear end of the lever 46 is bifurcated and fitted with a roller 52 to reduce friction on the parts when engagement is made with either of the flanges 57 or 58. This horizontallydisposedlever 46 operates the movable gripping-die 4, the connecting-pin 8, previously described, being connected therewith by a link 9 in a manner that when said lever is thrown inward by the operator the dies 4 and 4 are brought together about the stock at the same time that the clutch is engaged, or, in other words, the said gripping-dies are opened and closed simultaneously with the engaging and disengaging of the clutch members.

It will be seen by the above description, taken in connection with the accompanying drawings, that the machine is semi-automatic in its operation. The operator manipulating the lever 46 to close the gripping-dies and throw the clutch into engagement to rotate the counter-shaft, which brings the headingdies forward, enters the heated end of the stock 9 therein prior to the said dies coming together. and by the continued rotatable movement of said shaft 20 and the correa series of three integralv annular flanges l spending rotatable movement of the flanged The clutch is thrown into head the machine or moving parts are automatically stopped when one complete revolution of the counter-shaft 20 has been made. This automatic stop mechanism will be found particularly useful when operating upon long or heavy pieces of stock, as it gives the operator time and opportunity to properly enter such pieces in the proper position. WVhen operating upon such long or heavy pieces, the ejector and its connected parts may be removed by releasing the nuts from their bolts and lifting the said parts free.

By making the forming-dies 32 and 34 in separable sections the work of shaping the recesses 33 is simplified, and as the stock 9 enters the semicircular groove 35 of the fixed or stationary die the scale formed by the heating of said stock is completely removed by the sharp forward edge, thereby producmg in the final result a smooth finished head.

Various slight modificatlons and changes may be made in the details of construction without departing from the spirit of the invention. Therefore I do not wish to confine myself to the exact construction shown and described, but wish to claim all such modified constructions as would come properly within the general scope of the invention.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

1. In a machine for making bolts, pins, 630., the combination of a counter-shaft with separable gripping-dies, one of which is stationary and the other has a direct lateral movement, a lever for imparting said lateral movement toward the stationary die, means on the counter-shaft imparting said movement, means for locking said lever in this position, and means connected to the countershaft for unlocking said lever.

2. In a machine of the class described, separable gripping-dies in two parts, one of which has a lateral movement, a lever pivoted to the frame of the machine and having means at one end for operating said movable grippingdie, a counter-shaft carrying a of said flanges provided with a cam adapted to engage said pin, means for locking the lever and connections free from the peripheral cam and to likewise unlock the lever.

3. In a machine of the class described, a drive-shaft, a counter-shaft geared to the drive-shaft to operate the moving parts of the machine and carrying a clutch member, a head slidably mounted on said countershaft and rotative therewith and formed with three flanges spaced apart, one of said flanges having a clutch member for cooperating with the clutch member of said countershaft and with a peripheral cam, and another of said flanges provided with a lateral cam, a pivoted. lever one end of which projects between two of said flanges, a stationary pin projecting between the flanges in the path of said lateral cam and adapted to open said clutch during the rotation of said moving head, a rod mounted on said pivoted lever, a bar having spaced recesses, a latch swinging on said lever and adapted to be alternately engaged with said recesses, separable gripping-dies in two parts, one of which has a lateral movement and connected to said lever and arranged to be operated thereby, whereby said laterally-moving grippingdie may be locked against said stationary die and automatically released and separated from the same. i

In testimony whereof I afliX my signature in presence of two witnesses.

JOHN FRED LOBER.

Witnesses:

E. J. BIGGS, C. 0. LEE. 

